Track for sliding doors.



PATENTED AUG. 16, 1904.

H. 0. SMITH. I TRACK FOR SLIDING DOORS.

APPLICATION FILED JAN. 21. 1904.

N0 MODEL.

U ITED STATES Patented August 16, 1904.

PATENT OFFICE.

HENRY C. SMITH, OF CHICAGO, ILLINOIS.

TRACK FOR SLIDING Boone.

' SPECIFICATION forming part of Letters Patent No. 767,668, dated August 16, 1904.

Application filed January 21, 1904. Serial No. 189,982. (No model.)

To all whom/it may concern.-

Be it known that I, HENRY C. SMITH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new, useful, and Improved Track for Sliding Doors, of which the following is a full, clear, and exact description, reference being' had to the accompanying drawings, forming a part of this specification, in which corresponding letters of reference in the different figures indicate like parts.

The object of my invention is to provide a track and suitable bracket-supports therefor which may be applicable to sliding doors, and more particularly to that class of sliding doors which are made of unusual weight'such, for example, as fire-doors, in which the action heat is an element to be considered.

To these ends my invention consists in the combination of elements hereinafter more 7 particularly described, and definitely pointed to support a sliding door 0, which may be suspended therefrom by means of hangers d of any well-known form.

Rigidly attached to the wall by means of bolts or screws are end brackets e e, which are fitted to the ends of the track, and a series of intermediate supporting-brackets, (generally designated by f.) Each of said brackets is provided with an arm 9 for supporting the track away from the wall, upon'the end of which arm is formed'a head h, adapted to fit or contact with and to be inserted-within the interior of the tubular track 6. In addition to being formed to contact with the interior of the tubular portion of the track, so as to support the. same, the head of each of said brackets is provided with a recess or notch a, Fig. 2, upon the top thereof, which notch is preferably made in the form shown in said figure to receive and serve as a seat for a supplemental or reinforcing bar j, which rests within said notch and is extended longitudinally throughout the length of the tubular portion a with its upper face or edge in contact with the interior of said tube. Said reinforcing-bar is preferably rounded upon its upper face to fit the upper interior surface of said tube, as shown.

I do not confine myself to any particular shape in cross-section of the tube Z), which is slotted, preferably in the rear, as shown at is, for the reception of the bracket-arm g," nor do I limit the cross-sectional contour of the bar to any particular form. For example,

in Fig. 3 I have shown a T-shaped reinforcing-bar Z, in which the upper face is rounded. In this construction the upper part of the head it is cut away, as shown at m m, to pro- 'vide for the lateral flanges n n of the bar.

In Fig. 4 the head is provided with a dovetailed notch 0 to receive a'correspondinglyshaped bar p. It is obvious that any other cross-sectional form of bar may be utilized without departing from the principle involvedviz., that of supplying an independent reinforcement to the interior of a tubular track. I

In Fig. 5 I have placed the slotted opening g at the bottom instead of in'the rear of the track and have bent the arm g upwardly, as

shown at "r.

relatively thin metal tube tends to collapse readily when heated. On the other hand, the heavier metal bar is not onlyless likely to collapse under corresponding conditions, but being inclosed within the tube is actually protected thereby and serves to amply sustain the latter, which of itself would frequently give way.

Having thus described my invention, I terior of said. tubular track, and a reinforcclaim ing-bar supported in notches formed Within 1. A track for sliding doors consisting of said heads, the upper faces of said bar being 5 a tubular structure supported by means of in supporting contact With the inner upper 5 brackets having contact with the interior surface of said tubular track.

thereof, in combination With an independent In testimony whereof I have signed this longitudinal supporting-bar sustained by said specification, in the presence of two subscribbraokets,and located Within said tubular strucing Witnesses,this 30th day of December, 1903. 20

ture. HENRY C. SMITH. IO 2. The combination With a tubular track Witnesses:

for sliding doors, of supporting-brackets hav- D. H. FLETCHER,

ing heads arranged to project Within the in- G. E. JORDAN. 

